package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String code = userLoginDTO.getCode();
        String openid = getOpenId(code);

        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //根据openid查询用户
        User user = userMapper.getByOpenId(openid);
        //判断是否为新用户
        if (user == null){
            user = User.builder()
                       .openid(openid)
                       .createTime(LocalDateTime.now())
                       .build();
            //新用户注册
            userMapper.insert(user);
        }

        //返回结果

        return user;
    }

    private String getOpenId(String code){
            //获取openId
        Map<String, String> clims = new HashMap<>();
        clims.put("appid",weChatProperties.getAppid());
        clims.put("secret",weChatProperties.getSecret());
        clims.put("js_code",code);
        clims.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, clims);

        //获取不到异常处理
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
